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Program Trading Accounts
For 18.1% of NYSE Volume

NEW YORK -- Program trading in the week ended Aug. 11 accounted for 18.1%, or an average 169.3 million daily shares, of New York Stock Exchange volume.

Brokerage firms executed an additional 66.9 million daily shares of program trading away from the NYSE, with 7.6% of the overall total on foreign markets. Program trading is the simultaneous purchase or sale of at least 15 different stocks with a total value of $1 million or more.